On Mar 10, 2007, at 12:32 AM, Andrzej Bialecki wrote:
I think the experience on big clusters at Yahoo! is that 0.12.1
should be more stable than 0.11.2, but others can confirm that.
Hm.. That's not the impression I have from JIRA and the mailing
list. My impression is that even though 0.12.1 is more robust in
some situations, the significant changes (checksum filesystem,
speculative execution, in memory sorting, improved map output
handling, etc, etc) made between these releases introduced many
subtle bugs which only now start coming into light.
We never upgraded our main clusters to 11.2 because it never
stabilized to our satisfaction, which is why I was proposing an 11.3.
However, 12.1 is looking pretty good with the exception of a couple
of bugs and we decided to hold out for 12.1. At this point, if I was
going to 11, I'd want a lot of the fixes that have been done in between.
-- Owen
